A mm-Wave Circulator with High Transmitter and Receiver Isolation David W. Porterfield, Ph.D. President and Founder Micro Harmonics Corporation Circulators are used in transmit/receive systems to allow a transmitter and receiver to share a common antenna. A circulator schematic is shown in Figure 1, with typical connections for the transmitter (Tx), receiver (Rx), and antenna [...]
Time to redefine a second? While the cesium atom remains the industry standard for measuring time, the world’s first atomic clocks used a molecule (ammonia) instead of atoms. Now, researchers are returning to molecules to produce portable atomic clocks. Read about how our isolators are enabling this breakthrough at frequencies above 300 GHz. The full [...]
Our new hybrid circulator has been granted a patent (No. 12,034,196). The new wideband hybrid circulator technology is a replacement for the traditional Y-junction circulator. The hybrid circulator is a passive device similar in size to the Y-junction but having an astounding 24% fractional bandwidth in every band from WR-15 (54-68 GHz) through WR-3.4 (258-330 [...]
Are Faraday Rotation Isolators Sensitive to Magnetic Fields? Some Faraday rotation isolators are very sensitive to magnetic fields while others show almost no sensitivity at all. It depends on the magnetic bias point. Faraday rotation isolators employ a magnetically biased ferrite rod. An internal magnet or an array of magnets is used to bias the [...]
Micro Harmonics is pleased to announce that we have once again been placed on the Inc. 5000 List of Fastest-Growing Private Companies. Read our press release here.
We were featured in this month’s issue of Microwave Journal! The story is about a common issue in MMW systems, out-of-phase reflected signals which can perturb the operating point of the upstream component. Read about how our isolators are solving this issue all the way into the THz regime.
Do mm-Wave Power Amplifiers Need Isolators? The answer to the question is often yes. It is common to see a mm-wave power amplifier with an isolator attached to the output port. The reason may have less to do with the impedance matching of the amplifier and more with the impedance matching of the load. The [...]
Design Engineer, James Greenberg was quoted in a recent story that appeared in Electronics for Engineers saying, “The Micro Harmonics isolators have a really wide band which allows us to look at a range of molecules at different frequencies using the same spectrometer as previous experiment with the exact same isolator.” Read the full story [...]
Radiation Testing of Micro Harmonics Isolators Space exploration has always pushed the boundaries of technology, requiring instruments that can withstand the harsh conditions beyond Earth’s atmosphere. One of the critical factors that must be considered when designing space-based instruments, such as isolators, is their ability to endure the effects of radiation, particularly the Total Ionizing [...]
System designers are overcoming the issue of signal reflections at MMW and THz frequencies. “High isolation was extremely important, and we were getting 30 dB of isolation with the isolators from Micro Harmonics at over 300 GHz,” explains Research Scientist James Greenberg. Read the full story from Design2Part Magazine:
